EXPERIMENTAL-STUDY OF REACTIVE MIXING IN A LAMINAR-FLOW BATCH REACTOR

Batch mixing with chemical reaction in the laminar flow regime was stu died using a helical ribbon impeller and a Newtonian fluid. A chemical reaction between crystal violet dye and sodium hydroxide was used, wi th the progress of the reaction being followed by means of a spectroph otometer. Comparison of the experimental circulation time results with other experimental data from the literature and with results obtained from numerical simulation showed good agreement. Good agreement was a lso obtained with experimental results obtained using a thermal respon se method. The dimensionless mixing time, defined as the point at whic h the concentration reached 95% of its ultimate value in the absence o f chemical reaction, was found to be 10 times the dimensionless circul ation time.